Add stubs for built-in plugins

Signed-off-by: falkTX <falktx@falktx.com>

plugins/Cardinal/plugin.json

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+{
+  "slug": "Cardinal",
+  "name": "Cardinal",
+  "version": "2.0.0",
+  "license": "GPL-3.0-or-later",
+  "brand": "DISTRHO",
+  "author": "DISTRHO",
+  "authorEmail": "falktx@falktx.com",
+  "pluginUrl": "https://github.com/DISTRHO/Cardinal",
+  "authorUrl": "https://github.com/DISTRHO/Cardinal",
+  "manualUrl": "https://github.com/DISTRHO/Cardinal/wiki",
+  "sourceUrl": "https://github.com/DISTRHO/Cardinal",
+  "changelogUrl": "",
+  "modules": []
+}

plugins/Cardinal/src/HostParameters.cpp

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+/*
+ * DISTRHO Cardinal Plugin
+ * Copyright (C) 2021 Filipe Coelho <falktx@falktx.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 3 of
+ * the License, or any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * For a full copy of the GNU General Public License see the LICENSE file.
+ */
+
+#include "plugin.hpp"
+
+struct HostParameters : Module {
+    enum ParamIds {
+        NUM_PARAMS
+    };
+    enum InputIds {
+        NUM_INPUTS
+    };
+    enum OutputIds {
+        NUM_OUTPUTS
+    };
+    enum LightIds {
+        NUM_LIGHTS
+    };
+
+    HostParameters() {
+        config(NUM_PARAMS, NUM_INPUTS, NUM_OUTPUTS, NUM_LIGHTS);
+    }
+
+    void process(const ProcessArgs&) override {
+        // TODO
+    }
+};
+
+struct HostParametersWidget : ModuleWidget {
+    HostParametersWidget(HostParameters* const module) {
+        setModule(module);
+        setPanel(APP->window->loadSvg(asset::plugin(pluginInstance, "res/HostParameters.svg")));
+    }
+};
+
+Model* modelHostParameters = createModel<HostParameters, HostParametersWidget>("HostParameters");

plugins/Cardinal/src/HostTime.cpp

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+/*
+ * DISTRHO Cardinal Plugin
+ * Copyright (C) 2021 Filipe Coelho <falktx@falktx.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 3 of
+ * the License, or any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * For a full copy of the GNU General Public License see the LICENSE file.
+ */
+
+#include "plugin.hpp"
+
+struct HostTime : Module {
+    enum ParamIds {
+        NUM_PARAMS
+    };
+    enum InputIds {
+        NUM_INPUTS
+    };
+    enum OutputIds {
+        NUM_OUTPUTS
+    };
+    enum LightIds {
+        NUM_LIGHTS
+    };
+
+    HostTime() {
+        config(NUM_PARAMS, NUM_INPUTS, NUM_OUTPUTS, NUM_LIGHTS);
+    }
+
+    void process(const ProcessArgs&) override {
+        // TODO
+    }
+};
+
+struct HostTimeWidget : ModuleWidget {
+    HostTimeWidget(HostTime* const module) {
+        setModule(module);
+        setPanel(APP->window->loadSvg(asset::plugin(pluginInstance, "res/HostTime.svg")));
+    }
+};
+
+Model* modelHostTime = createModel<HostTime, HostTimeWidget>("HostTime");

plugins/Cardinal/src/plugin.hpp

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+/*
+ * DISTRHO Cardinal Plugin
+ * Copyright (C) 2021 Filipe Coelho <falktx@falktx.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 3 of
+ * the License, or any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * For a full copy of the GNU General Public License see the LICENSE file.
+ */
+
+#pragma once
+
+#include "rack.hpp"
+
+using namespace rack;
+
+extern Plugin* pluginInstance;
+
+extern Model* modelHostParameters;
+extern Model* modelHostTime;